The effect of spraying certain anti-stress agents on growth performance and fruit quality of Superior grapevines

Document Type : Original Article

Authors

1 Pomology Department., Faculty of Agriculture., Assiut University, Assiut, Egypt

2 Department of Horticulture, Faculty of Agriculture, South Valley University, Qena, Egypt

Abstract

This study was carried out during two successive seasons of 2022 and 2023 to clarifying the effect of citric acid, salicylic acid, boron, potassium silicate and amino acids on vegetative and fruiting of "Superior" seedless grapevines. The experiment was set up in a complete randomized block design with six treatments, three replicates, and two grapevines each. Citric acid and salicylic acid at 1500 ppm, boron at 500 ppm, potassium silicate at 3000 ppm and amino acids at 2000 ppm were applied on clusters and leaves, three times a year, when the vegetative growth reaches 20 cm, after berry set and one month later. Application forms of amino acids, boron, and potassium as well as citric and salicylic acids significantly stimulated the vegetative growth traits more than untreated ones (control). Also, all treatments significantly increased the yield components to untreated ones (control). Moreover, they significantly improved the berry juice in terms of raise total soluble solids (TSS) and sugar contents and decreased the total acidity. Hence, it could be concluded that foliar application of salicylic acid, citric acid, boron, potassium silicate and amino acids, are useful in the improvement of nutritional status and productivity of grapevines, where that may be tolerated the harmful effects of heat stress.

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